Lifting-jack



(Model.)

0. H. SEARS.

LIP-TING JACK. No. 246,222. Patented Aug. 23,1881.

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OHAPIN H. SEARS, OF RUSH CENTRE, KANSAS.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 246,222, dated August 23, 1881.

Application filed June 3, 188].

lifting-jacks; and it consists in the combination ot' the base, a standard, an operating-lever, and a lifting-bar, together with the connecting-straps by which the various parts are united together, as will be more fully described hereinafter.

The objectof my invention is to provide a jack by means of which heavy wagons and vehicles of all kinds can he lifted with the greatest ease.

The accompanyingdrawing represents aperspective of my invention.

A represents a suitable base, to which the standard B is rigidly secured in any suitable manner. Iivoted to the top of this standard by means of the links 0 is the lifting-bar D, which has its upper end provided with any suitable number of shoulders for the purpose of catching under axles of different heights. lhe lower end of this elevating-bar is loosely connected to the front en (1 of the base by means of the two straps or links F, as shown. Also connected to the lower end of this lifting-bar, by the "same pivotal bolt which passes through the straps or links I, are the links or straps G, which have their rear ends pivoted to the (Model) operating-lever H at a suitable distance from its inner end. This lever has its upper corner slightly rounded away, so that it can be freely turned up or down without having to draw the lower end of the elevating or lilting bar inward toward the standard. This standardB has a recess or shoulder, I, formed in its rear side, as shown, and in which theinner end of the lever catches while a weight of any kind is being applied to the top of the lifting-bar. While the end of the lever is made to catch in this shoulder or recess the straps which connect the lever with the lower end of the lifting-bar are in a straight line with the lever, so that all downward pressure upon the top of the lifting-bar simply exerts an endwise pull upon the lever, as shown.

When it is desired to allow the lifting-bar to descend it is only necessary to turn the lever slightly upward, so that its round end can slip downward, when the lifting-barwill descend at once by the weight upon its top.

Having thus described my invention, I claim lll a lifting-jack, the combination of the base A, standard B, the links 0, which unite the upper end of the standard with the upper end of the lifting-bar D, the links 1, for uniting the lower end of the lifting-bar to the base, and the links G, for connecting the lifting-bar D with the lever H, all combined and arranged to operate substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

- OHAPIN H. SEARS. Witnesses:

J. W. RHonEs, B. F. DEUEL. 

